Installed Firefox but ethernet not recognised

Hi there,


I've just installed firefox on my mother's laptop and it worked for a while but then stopped connecting altogether, the network doesn't show up anymore. Whereas it was working fine when using IE before, now whenever it's plugged into the modem via ethernet I get the driver screen coming up asking for the driver for the ethernet plug, which doesn't seem to exist on the computer and I can't get online to download one.


Is it as simple as uninstalling firefox or do I have a bigger problem? (apart from if my mother finds out I've unknowingly destroyed her laptop D: )


Thanks in advance.